PT Journal AU Murata, K Yano, E Shinozaki, T TI Impact of shift work on cardiovascular functions in a 10-year follow-up study SO Scandinavian Journal of Work, Environment & Health PD 6VL PY 1999 BP 272 EP 277 IS 3 DI 10.5271/sjweh.434 WP https://www.sjweh.fi/show_abstract.php?abstract_id=434 DE blood pressure; cardiovascular effect; heart rate-adjusted QT interval; shift work SN 0355-3140 AB '

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OBJECTIVES ': 'The purpose of this study was to determine whether shift work affects the heart-rate-adjusted QT interval (QTc) in electorcardiography (ECG) and the blood pressure of workers without overt cardiovascular dysfunction.'

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METHODS ': 'At a copper smelter, 158 shift workers and 75 day workers who underwent an ECG examination and blood pressure measurements in 1986 were followed for 10 years. In 1996, biochemical indicators such as high-density lipoprotein cholesterol and triglycerides were measured, together with the QTc.'

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RESULTS ': 'In 1986 and 1996, the QTc was significantly longer in the shift workers than in the day workers. Of 180 workers with a normal QTc ( ER